Sales of People magazine are compared over a 5-week period at four Borders outlets in Chicago. Are the population variances the same for weekly sales (4 stores)? ITTT Weekly Sales Store 1 Store 2 Store 3 Store 4 102 97 89 100 106 77 91 116 105 82 75 87 115 80 106 102 112 101 94 100 Click here for the Excel Data File (a) Calculate the degrees of freedom. dfi df2 (b) Based on the given hypotheses, choose the correct option. H: o21 = o22 23 24; Hị: Not all the variances are equal at a 0.05 Reject the null hypothesis if H> 20.6 Reject the null hypothesis if H< 20.6 (c) Calculate the value of Hcalc- (Round your answer to 2 decimal places.) Hcalc (d) Should we reject the null hypothesis? No Yes

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
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Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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Hi,

I need help with the attached homework question and below is the excel data file for you as well.

Store 1 Store 2 Store 3 Store 4
102 97 89 100
106 77 91 116
105 82 75 87
115 80 106 102
112 101 94 100

Thanks!

Sales of People magazine are compared over a 5-week period at four Borders outlets in Chicago. Are the population variances the
same for weekly sales (4 stores)?
ITTT
Weekly Sales
Store 1
Store 2
Store 3
Store 4
102
97
89
100
106
77
91
116
105
82
75
87
115
80
106
102
112
101
94
100
Click here for the Excel Data File
(a) Calculate the degrees of freedom.
dfi
df2
(b) Based on the given hypotheses, choose the correct option. H: o21 = o22 23 24; Hị: Not all the variances are equal at a
0.05
Reject the null hypothesis if H> 20.6
Reject the null hypothesis if H< 20.6
(c) Calculate the value of Hcalc- (Round your answer to 2 decimal places.)
Hcalc
(d) Should we reject the null hypothesis?
No
Yes
Transcribed Image Text:Sales of People magazine are compared over a 5-week period at four Borders outlets in Chicago. Are the population variances the same for weekly sales (4 stores)? ITTT Weekly Sales Store 1 Store 2 Store 3 Store 4 102 97 89 100 106 77 91 116 105 82 75 87 115 80 106 102 112 101 94 100 Click here for the Excel Data File (a) Calculate the degrees of freedom. dfi df2 (b) Based on the given hypotheses, choose the correct option. H: o21 = o22 23 24; Hị: Not all the variances are equal at a 0.05 Reject the null hypothesis if H> 20.6 Reject the null hypothesis if H< 20.6 (c) Calculate the value of Hcalc- (Round your answer to 2 decimal places.) Hcalc (d) Should we reject the null hypothesis? No Yes
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